What is the True Nature of Antimatter?

In summary: This is where it gets a little more complicated. In the case of baryon(having three quarks) or meson(a particle made of one quark and one anti-quark), you have a whole bunch of these eigenstates. So if you ask "Can I flip this electron to a positron?" I can answer with "Yes, so long as you flip this positron over here to an electron, through some long range photon exchange, at the same time."So if you ask "Can I flip this electron to a positron?" I can answer with "Yes, so long as you flip this positron over here to an electron, through some long range photon exchange, at the same time
  • #1
bodykey
46
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What is Antimatter -- really?

I've been trying to get a grasp of what they ideal of antimatter is exactly. I do understand that it's the 'opposite' of 'matter'. Electronics, Neutrons, Protons, all have an 'opposite', and I've seen where the folks over at CERN have been smashing atoms together to get an exploding result hopefully creating antimatter. I understand that when one touches the other, they annhiallate. But what confuses me is...if it's about their charge then, and please excuse me if this thought is just stupid, I'm flying by the seat of my pants on this one...wouldn't there be a way to just 'flip' the charge?

I even feel my last statement isn't exactly up to par, but that's why I'm asking the question...what is antimatter?
 
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  • #2
and I've seen where the folks over at CERN have been smashing atoms together to get an exploding result hopefully creating antimatter.
Hopefully? They have been doing this successfully for over 50 years now.

But what confuses me is...if it's about their charge then, and please excuse me if this thought is just stupid, I'm flying by the seat of my pants on this one...wouldn't there be a way to just 'flip' the charge?
What do you mean with "flip" the charge?
I guess you mean the electric charge. This is conserved - no particle can just change its charge.
 
  • #3
hi bodykey! :smile:
bodykey said:
… I understand that when one touches the other, they annhiallate. But what confuses me is...if it's about their charge then, and please excuse me if this thought is just stupid, I'm flying by the seat of my pants on this one...wouldn't there be a way to just 'flip' the charge?

antimatter is pretty much as you have described it

i don't see any point in looking for some reason for it

if by "flipping" you mean like the way an electron in an atom can flip from one energy level to another, the answer is no:

the transformation required (to turn a particle into its antiparticle) would involve turning space (or time) inside-out
 
  • #4
I don't know to be honest. If you take an individual particle, then no you can't as far as we know. But if you look into neutral meson and baryon(KKbar DDbar BBbar BsBsbar n-nbar etc) oscillations, you can have a pair of particles : Q q~ (*where ~ means anti particle *)and have:
Q q~ > Q~ q

So each flipped from particle to anti-particle and vice versa, as a pair. This happens through an echange of another particle or two, but it can happen nonetheless (its experimentally observed).

So if you ask "Can I flip this electron to a positron?" I can answer with "Yes, so long as you flip this positron over here to an electron, through some long range photon exchange, at the same time."
 
  • #5
Hepth said:
So if you ask "Can I flip this electron to a positron?" I can answer with "Yes, so long as you flip this positron over here to an electron, through some long range photon exchange, at the same time."
A photon exchange won't work. You will need a lepton exchange, but then I don't think you can call it "flipped" any more. The particles just changed their position.
 
  • #6
I quite like the minutephysics analogy with "3-ness", i.e. that just as you can call upon the universal spirit of "3-ness" to produce both 3s and -3s, so too can electrons and anti-electrons be summoned from the same underlying electron field.



It's not quite that simple of course, but thinking in terms of the underlying fields is the place to start I think.
 
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  • #7
Hepth said:
I don't know to be honest. If you take an individual particle, then no you can't as far as we know. But if you look into neutral meson and baryon(KKbar DDbar BBbar BsBsbar n-nbar etc) oscillations, you can have a pair of particles : Q q~ (*where ~ means anti particle *)and have:
Q q~ > Q~ q

So each flipped from particle to anti-particle and vice versa, as a pair. This happens through an echange of another particle or two, but it can happen nonetheless (its experimentally observed).
K-Kbar oscillations involve just an individual particle, not a pair of particles. The eigenstates K-long and K-short are linear superpositions of K and K-bar.
 

1. What is antimatter?

Antimatter is a type of matter that is composed of antiparticles, which have the same mass as regular particles but opposite charge. For example, the antiparticle of an electron is a positron, which has a positive charge instead of a negative charge. When matter and antimatter come into contact, they annihilate each other, releasing a large amount of energy in the form of gamma rays.

2. Where does antimatter come from?

Antimatter can be created through high-energy particle collisions, such as those that occur in particle accelerators. It can also be produced naturally in certain radioactive decays and cosmic rays. However, due to its unstable nature, antimatter is typically only found in small amounts in the universe.

3. How is antimatter used?

Antimatter has many potential uses, but it is currently only produced in small quantities and is very expensive to create. It has been used in medical imaging and cancer treatments, as well as in experiments to study the fundamental properties of matter. It also has potential applications in energy production and propulsion for space travel.

4. Is antimatter dangerous?

Antimatter is not inherently dangerous, but it can be destructive when it comes into contact with regular matter. However, due to the difficulty in producing and containing large amounts of antimatter, it is not a significant safety concern. The biggest danger associated with antimatter is its potential use in weapons, but this is currently only a theoretical concern.

5. Can antimatter be harnessed as an energy source?

Antimatter has the potential to be a highly efficient energy source, as it can release a large amount of energy when it annihilates with matter. However, the process of creating and storing antimatter is currently very costly and inefficient, making it impractical as an energy source at this time. Researchers are working on finding more efficient ways to produce and contain antimatter for potential future energy applications.

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